[Dovecot] Design details of high performance dovecot cluster
Robert Schetterer
rs at sys4.de
Fri Dec 6 13:12:44 EET 2013
Am 06.12.2013 11:28, schrieb JEHERUL:
> Dear All,
>
> Currently we are running a mail system for 10000 users each 2GB mailbox. At
> present we have 5 mail servers where users mailboxes are distributed almost
> uniformly.
looks enough
We have a HP SAN Storage (HP EVA 6400) where mailboxes are
> stored. We partition the storage into five vg and each is mounted on the 5
> servers. We are using postfix and dovecot.
>
> The system was running fine but currently we notices high IO load due to
> IMAP connection. So we are planning to build a dovecot cluster.
ident the io problem on the storage, give more info about mailbox
format etc
perhaps read
http://wiki2.dovecot.org/MailLocation/SharedDisk
http://wiki2.dovecot.org/NFS
>
> Please suggest some design for the dovecot cluster keeping in mind to our
> scenario. (If needed we can buy additional hardware like load balancer).
you should use loadbalancer, you dont have to buy it , something like
keepalived etc is enough, however you should use
http://wiki2.dovecot.org/Director with more servers
for an idea with loadbalancers look at
http://sys4.de/de/blog/2013/06/10/loadbalancing-mit-keepalived-postfix-dovecot/
( sorry german only )
>
> With Thanks and Regards
>
at last
you have to give more info like dovecot version , config
logfiles , general setup
Best Regards
MfG Robert Schetterer
--
[*] sys4 AG
http://sys4.de, +49 (89) 30 90 46 64
Franziskanerstraße 15, 81669 München
Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263
Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer
Aufsichtsratsvorsitzender: Florian Kirstein
More information about the dovecot
mailing list